POV-Ray : Newsgroups : povray.animations : Jerky MPEG playback Server Time
28 Jul 2024 18:17:37 EDT (-0400)
  Jerky MPEG playback (Message 1 to 4 of 4)  
From: Todd Burch
Subject: Jerky MPEG playback
Date: 25 Sep 1998 16:02:42
Message: <360BE8D7.6D56B79@uiuc.edu>
Okay, I've got another question for everyone:
	I just finished rendering and compressing a 10 second, 300 frame
704x480 MPEG that came out to be 13 Megs. When I play it back, the video
is jerky. I assume this is due to the relatively slow transfer of MPEG
data between the hard disk and the program. Is there any way to remedy
this? Could I possibly create a "virtual" hard drive in memory? I have
64 megs of memory and am running Win95.
	Any help would be appreciated.
	-Thanks,
	Todd
-- 
===============================================
Todd Burch
tbu### [at] uiucedu
www.uiuc.edu/~tburch
University of Illinois at Urbana-Champaign
-----------------------------------------------
"He who forgets will be destined to remember"
	-Edward Vedder, Pearl Jam
===============================================


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From: Todd Burch
Subject: Re: Jerky MPEG playback
Date: 25 Sep 1998 18:55:51
Message: <360C1165.29E88124@uiuc.edu>
I'm pretty sure it's not my machine; I have a 400 MHz Pentium II MMX w/
64 Megs of RAM, an 8 Meg video card, and an mpeg decoder card. Any other
suggestions?
	By the way, could someone tell me how to create a RAM disk in Win95?
Thanks.
	-Todd
-- 
===============================================
Todd Burch
tbu### [at] uiucedu
www.uiuc.edu/~tburch
University of Illinois at Urbana-Champaign
-----------------------------------------------
"He who forgets will be destined to remember"
	-Edward Vedder, Pearl Jam
===============================================


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From: Ken Cecka
Subject: Re: Jerky MPEG playback
Date: 25 Sep 1998 19:45:09
Message: <360c1cf5.0@news.povray.org>
As far as I can tell, Windows 95 does not come with any built in facilities
for ram disks (at least none that are supported).  There is a hold-over from
dos days though which can sometimes be made to work.  Check your windows
directory for a file called ramdrive.sys.  If you have it, in your config
sys, put the line "device = ramdrive.sys X" without the quotes, where X is
the number of kilobytes (or it might be in bytes, can't remember) you want
to allocate.  There are several problems you may encounter doing this
though.  First off, the only documentation I am aware of for ramdrive.sys
comes in the online help included in old MSDOS versions (5 and 6).  Second,
ramdrive.sys has no facility for specifying which drive letter you want to
use.  Instead it just grabs the next one available.  If it loads before your
cdrom drive is assigned a letter, your cdrom drive will be bumped (this is
pretty much unavoidable if your cdrom drive uses mscdex).  Finally, windows
has been know to hang during bootup when using ramdrive.sys.  So I make no
promises, but I have gotten it to work before.  And I know microsoft
considered it as a possibility because when it does work, the icon for the
ramdrive appears as a little chip instead of the usual box.

Ken

Todd Burch wrote in message <360C1165.29E88124@uiuc.edu>...
>I'm pretty sure it's not my machine; I have a 400 MHz Pentium II MMX w/
>64 Megs of RAM, an 8 Meg video card, and an mpeg decoder card. Any other
>suggestions?
> By the way, could someone tell me how to create a RAM disk in Win95?
>Thanks.
> -Todd
>--
>===============================================
>Todd Burch
>tbu### [at] uiucedu
>www.uiuc.edu/~tburch
>University of Illinois at Urbana-Champaign
>-----------------------------------------------
>"He who forgets will be destined to remember"
> -Edward Vedder, Pearl Jam
>===============================================


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From: Matthew Mc Clement
Subject: Re: Jerky MPEG playback
Date: 26 Sep 1998 13:22:49
Message: <360d14d9.0@news.povray.org>
Just a quick note about the online help. If you have the Win95 CD, you can
get the online help in
D:\OTHER\OLDMSDOS, D: being your cd-rom drive letter. Just browse to this
folder, and there should be a file called help.exe. Double click on this and
you should get a list of MS-DOS commands. Look for ramdrive.sys and click on
this.

Cheers, Matthew


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